I'm all too familiar with the "between homes" scenario! For the first couple of years, I just used my laundry with the windows blacked out with garbage bags. I've just recently re-located everything to a spare room. No plumbing in there, unfortunately, but it's easy enough to keep prints in a holding tray until the end of the session. This is being done in a rental property so it can definitely be done without owning your own home or having something entirely dedicated as a darkroom.
Not sure if that helps you or not.... just wanting to let you know that it's not impossible!